Oscab woodward



0. WOODWARD.

COMPUTING MACHINE. APPLICATION FILED 0501s, 1920.

1,401,225. Patented Dec. 27, 1921.

WWNEEEEE H 5 ATTURNEY UNITED- STATES PATENT OFFICE.

OSCAR WOODWABD, OF BABYLON, NEW YORK, ASSIGNOB "lO REMINGTON ACCOUNTING MACHINE OOBIjOBA'lION, OF NEW YORK,

N. Y., A. CORPORATION OF NEW YORK.

donrornwe-xncm.

Specification of Letters Patent.

Patented Dec. 27, 1921.-

Application filed December 18, 1920. Serial No. 481,181.

To all whom it may concern:

-Be it known that I, Osoan Woonwnno,

ing-Machines, of which the following is a specification. I

My invention relates to computmg ma chines and it has for its object to provide an improved roll or wheel construction for guiding the carriages or trucks of such ma chines.

My invention consists in certain features of construction and combinations and arrangements of parts, all of which will be fully set forth herein and particularly pointed out in the claims.

One instance of my invention is illustrated in the accompanying drawings in which,

Figure 1 is a fragmentary front to rear vertical section .through a portion of the Remington-Wahl typewriting and computing machine having my invention embodied .therein.

means of angled brackets 4 secured to the;

top plate 2 by screws 5 and to the framework 3 by screws 6. Arms or brackets 7 projecting forward from the typewriter carriage are at their forward ends loosely connected to bars or brackets 8, one fastened to each end of a computer truck 10, on which may be mounted one orseveral totalizers 11. Each of said totalizers contains computing mechanism including a series of gear wheels 12 which are adapted to mesh one at a time with the master wheel 13, the latter constitutin part of the actuating mechanism driven y the numeral keys of the typewriter.

As the typewriter carriage moves toward the left in the process of writing and computing a number, the wheels 12 move one after another into mesh with the master wheel 13. Said gears and the totalizers in whlch they are supported must of necessity be guidedacross said master wheel with a considerable degree of precision, as otherwise the teeth of said wheels might collide; and if the wheels 12 and 13 do not mesh properly, the operation may be hard or otherwise imperfect. In the Wahl machine as heretofore constructed the truck 8 has been somewhat loosely connected with the arms 7 by means of screws 14 one screwed into each of the brackets 7 from the front and passing through holes in the bars 8 somewhat larger than the screws and also having the space between the bracket 7 and the head of the screw somewhat greater than the thickness of the bar 8. The truck has therefore a small limited amount of freedom of movement at its ends both up and down and also front and back with respect to the ends of the brackets 7. The accurate guiding of the truck is effected at the middle of the machine substantially in the front-torear vertical plane of the master wheel, this being the point at which accuracy is required. To this end the truck has been given a cross section like that indicated in Fig. 1 so as to provide three trackways 15, 16 and 17. The trackway 15 is at the bottom of the truck and faces downward, and is supported by a roll or wheel 18 which carries the vertical weight of the truck and ofthe totalizers mounted on it. The trackway 16 is at the bottom of the truck and faces rearward and presses against a roll or wheel 20. The trackway 17 is at the top of the truck and presses forward against a roll somewhat similar to 18 and 20. This upper roll however has been replaced in the drawings by my improved construction, as will be hereinafter described.

The wheel or roll 18 has an axle 21 journaled in a sleeve 22 mounted in the framing 3. The hole through said sleeve for the axle is eccentric to the exterior cylindrical surface of the sleeve so that the roll 18 can be adjusted u and down by turning said sleeve 22 in t e framework. The axle 21 projects rearward from the sleeve 22 and has a collar 23 mounted on it and also two lock nuts 24 which latter prevent the axle from coming out of its hearing. The truck is formed just back of the wheel 18 with a flange 25 which would prevent the truck being accidentally moved forward more than a short limited distance at its lower part.

The wheel or roll 20 has a hole through it by which it takes a bearing on a pin 26 projecting downward from but eccentric to a pin 27 passing vertically throughv a hole in the frame 3. By turning this pin 27 the roll 20 can be given a nice adjustment front and back, so as to afford a corresponding adjustment for the lower part of the truck. Said pin 27 is secured in its adjusted position by a set screw 28.

The only remaining adjustment is a front and back adjustment of the upper forwardly faced trackway 17 and in the WVahl machine as heretofore manufactured this has been effected as follows: 30 represents a certain arbor used in my improvements but it occupies precisely the situation formerly occupied by the spindle or axle of a roll similar to the roll 18 and which cooperated with the track way 17. This arbor 30 is j ournaled in an eccentric bushing 31 mounted in an overhanging bracket 32 of the frame 3. This roll could be adjusted front and back by turning the bushing and said bushing was secured in adjusted position by drilling a hole vertically through the top flange of the bushing and through a pointer plate 33 and inserting a pin 34 into the hole, thus locking the bushing to the plate 33. A fiat headed screw 35 screwed into the upper end of the arbor 30 held this roll in place.

The plate 33 has a pointer 36 projecting forward therefrom and cooperating with a scale on the part 37 of the totalizer.

The truck ordinarily runs with the greater part of its weight supported on the three rolls 18 and 20 and the upper roll just de- I 18 by which the weight of said truck is sup-;

scribed. Accidental motion of the upper part of the truck toward the rear is limited by an adjusting screw 38 which is held in adjusted position by a set screw 40 and upward motion of the truck is limited by an adjusting screw 41 passing through the bracket 32 and also through the plate 33 so as to prevent said plate from turning about the bushing 31 as a pivot.

It may be added that the Wahl truck has a dovetail cross section at 42 over which the side plates of the totalizers fit and to which they are secured by a hand operated detent 43. which detent also has a tooth 44 meshing with a rack 45 secured to the front face of the truck.

It will be observed that the center of gravity of the truck is a little forward of the roll ported and this is especially so When several totalizers are mounted thereon and project ing forward therefrom, so that there is a constant pressure due to the weight of the parts backward on the lower back roll 20 and' forward on the upper front roll. In some instances a number of totalizers are mounted on one truck and the overhanging weight then becomes considerable and it has been found that sometimes the upper front roll cooperating with the trackway 17 fails to turn. Said trackway sliding against the roll gradually causes wear and these rolls are sometimes worn fiat so that they have to be replaced with new ones. Wear on this roll allows the upper part of the truck to drop forward and destroys the nice adjustment and relation between the wheels 12 and the master wheel 13. The immediate object of my invention has been to improve this upper front roll construction but my improvements are also applicable to the other two rolls and also to roll constructions of this general character in other similar situations.

By my improvement, I substitute a double-roll construction for the single roll formerly employed. I mount two rolls 46 on the ends of a carrier or evener 47 having the arb0r 30 projecting upward from the middle thereof. 'For convenience in applying my improvements to existing Wahl machines I make this arbor of the same dimensions as that of the single roll which my construction replaces and make it with a screw hole 48 in-its upper end for the reception of the screw 35. My improved roll construction can therefore be inserted into the eccentric bushing 31 of a machine already in use and it can be put intomanufa'cture without any modification of the parts of the Wahl machine other than the single roll which has been subject to wear as described. In other situations the evener 0r carrier 47 can of course be pivoted at its middle in other ways. The middle part of the carrier lies beneath the overhanging bracket 32, occupying the same vertical space that was formerly occupied by the roll at that point, and the ends of said carrier are enlarged and project upward as at 50, one of said upward projections lying at the right and the other at the left of the bracket 32. Said enlarged ends of the carrier are cut out underneath to provide space for the rolls 46. Said rolls are preferably journaled on shouldered pins or studs 51 riveted into the parts 50 of the carrier and each having a small head at its lower end to prevent theroll from falling off. In order to provide long bearings for the rolls each of the latter is preferably made with an upward projecting hub portion 52 to accommodate which the part 50 of the carrier is counterbored as shown. By making the studs 51 stationary and journaling the roll on them the bearing surfaces are brought into the plane of that part of each roll which presses against the rail 17. A roll thus journaled runs with less friction than one that is rigid on the end of an axle that projects out from its hearing as the old roll did.

ome;

the dimensions of the arbor 30, and this also not only diminishes friction but also 1n-- creases the amount of turning leverage that the periphery of the roll has over the bearing. For both of these masons there is less liability of my improved rolls failing to turn when the carriage is moving.

It will be noted that the two rolls, mounted as they are on a pivoted carrier, will exactly divide between them the forward pressure of the rail 17 so that the weight on each one of my rolls is just half of that on the old single roll. This both diminishes the tendency to wear and. also is an additional feature enabling me to make the studs 51 of small diameter. 7

Jurthermore, in case of a particle of dirt running under a single roll the upper part of the truck will be moved toward the rear a distance equal to the thicknes of such particle of dirt whereas in my construction the disturbance to the correct ition of the truck would be onl 1 half the thickness of the destruction so that under these conditions the truck will run truer with the two rolls than it will with only one.

In order to get exactly the correct result the adjustment of the various rolls or wheels 1% 2D and 46, said adjustments should he approximately in the front-to-rear vertical plane of the master wheel 13 so that a case of any lack of perfect straightness in the truck and any oi the truck due to the looseness of the connections with the arms 7, the particular wheel 12 which at the moment in meshwith the master wheel will nevertheless have precisely the right relation to said master wheel. By my construction notwithstanding the fact that the two rolls d6 are not situated in the middie of the machine but are on the contrary one to the right and the other to the left of the master wheel, the relation just described is not disturbed because said rolls are mounted on the carrier .47 which is itself ivoted in the plane of the master wheel an is adjustable front and back, in that plane. In case of any rocking of the truck at its ends said rocking will take place about the spindie 30 as an axis and as the said spindle is in the plane of the master wheel the rocking willL not disturb the relation of the wheel 12 to said master wheel- It will be understood of course that the rocking motion actually truck for supporting allowed to the truck in the Wahl mechanism is not great but is only enough to take care htness in the truck itself and other inaccuracies of manufacture. I

Various changes in details of construction and arrangement may be made without departing from my invention.

What I claim as new and desire to secure by Letters Patent, is

L In a computing machine,.the combination with a master wheel; a totalizer; and a said totalizer; of -a of any lack of absolute straig double-roll guide for said truck comprising two rolls, a carrier on which said rolls are journaled, and a pivot for said carrier, said pivot being substantially in the plane of said master wheel.

2. In a-calculating machine, the combination with a master wheel; a totalizer; and a truck for said totalizer; of a double-roll guide for said truck said guide comprising two rolls spaced apart, a carrier on which they are journaled, and a pivot for said carrier adjustable iront and back in the plane of said master wheel.

3. In a calculating machine, the combination with a master wheel; a totalizer; and a traveling truck on which said totalizer nxounted, of a double-roll guide for said truck, said guide comprising a carrier or evener having an arbor at its. middle by which it is pivoted and having two studs fixed thereto at its ends, and guide rolls journaled on said studs.

4. The combination with a stationary bracket, and a truck having av traclrway, of a carrier pivoted at its. middle to said bracket and having its ends: extending upward on the sides of said bracket, and rolls journaled on studs fixed in the upward extensions of said carrier.

5. The combination with stationary framework, of a truck a. trackway of a carrier pivoted between its ends in said framework, two rolls, one at each end of said carrier, and studs fixed in said carrier and on which said rolls are journaled.

S' ed at the borough of hianhattan, city of l ew York. in the coun of New York s day of and State of New York, December, A. D. 1926.

GSCAR W'OODWARD. 

